Mix the instant coffee and boiling water. Stir it well, and pour it into your mug of choice
Heat the milk in a glass container for 1 minute in a microwave, and give it a stir once it’s warmed up
Froth the hot milk for 2 minutes with a handheld frother. You’re aiming for a foam layer that’s 2 fingers thick – 35mm, to be precise.
Pour the frothed milk into the coffee
Sprinkle with nutmeg, cinnamon, or cocoa, and serve immediately